ADDING A RETURN LINE TO AN OEM NON-EVAP FUEL SYSTEM QUESTION

I've got the same job on my 'to do' list. I'm considering this:

https://www.efisystempro.com/fuel-tank-return-port-kit#tab-specification
Note there is also a reference on the above page to a Holley part that has a similar fitment.

I don't know how much room there is on the OEM sender hat. Maybe there is room for either of the above, maybe not.

Originally, I figured to simply attach my return line to the vapor return fitting at the top of the tank. Seems that won't work as that tank 'hole' is designed with a separator INside the tank...not something you could reasonably dump fuel INto from outside. Sure is a handily placed nipple, though!

The 'universal fuel tank return' above is going to be a splasher. Much better, seems, to return the fuel as 'quietly' as possible...preferably UNDER the fuel level in the tank.